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https://issues.apache.org/jira/browse/HBASE-25621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Stack resolved HBASE-25621.
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Fix Version/s: 2.4.3
2.3.5
2.5.0
3.0.0-alpha-1
Hadoop Flags: Reviewed
Resolution: Fixed
Pushed to branch-2.3+. Thanks for the patch [~Xiaolin Ha]
> Balancer should check region plan source to avoid misplace region groups
> ------------------------------------------------------------------------
>
> Key: HBASE-25621
> URL: https://issues.apache.org/jira/browse/HBASE-25621
> Project: HBase
> Issue Type: Improvement
> Components: Balancer
> Reporter: Xiaolin Ha
> Assignee: Xiaolin Ha
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.5.0, 2.3.5, 2.4.3
>
>
> Currently, balancer generates all group plans firstly, and then execute
> overall plans. When there are table regions movement between groups but after
> the groups plans generating and before executing, balancer may misplace the
> region to the old group. But this is not serious problem, next balancer will
> fix it.
> If we add a check before executing balance plans, we can avoid the problem.
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